Performance under the hard shells of silicon PU stadium is designed for healthy exercise professional structure. Stadium construction is an important aim of which is to provide professional sports, safe and healthy athletic condition, rich qualities hard to bring professional sports venues texture; and sports ground with flexible, can effectively increase the movement buffer reduce athletes ankle joints, ligaments ground reaction force due to the damage; while effectively reducing the movement due to fall, fall sports injuries caused by the accident. The band playing hard, playing professional sports without soft structure.